Package: postgresql-11-pg-failover-slots Source: pg-failover-slots Version: 1.0.1-1.pgdg18.04+1 Architecture: i386 Maintainer: Debian PostgreSQL Maintainers Installed-Size: 92 Depends: postgresql-11, libc6 (>= 2.4), libpq5 (>= 9.0~) Homepage: https://github.com/EnterpriseDB/pg_failover_slots/ Priority: optional Section: database Filename: pool/main/p/pg-failover-slots/postgresql-11-pg-failover-slots_1.0.1-1.pgdg18.04+1_i386.deb Size: 42192 SHA256: f4def5d0e59139bd2d7a175a9c4673fdd3322a05ba45b4699f5accb1970b79e4 SHA1: 010530f0c2278b9432b6071ee358d07d9299c1ad MD5sum: 22c51d0eb8379d3472ad100dcb55846f Description: High-availability support for PostgreSQL logical replication This extension is for anyone with Logical Replication Slots on Postgres databases that are also part of a Physical Streaming Replication architecture. . Since logical replication slots are only maintained on the primary node, downstream subscribers don't receive any new changes from a newly promoted primary until the slot is created, which is unsafe because the information that includes which data a subscriber has confirmed receiving and which log data still needs to be retained for the subscriber will have been lost, resulting in an unknown gap in data changes. PG Failover Slots makes logical replication slots usable across a physical failover using the following features: . - Copies any missing replication slots from the primary to the standby - Removes any slots from the standby that aren't found on the primary - Periodically synchronizes the position of slots on the standby based on the primary - Ensures that selected standbys receive data before any of the logical slot walsenders can send data to consumers